Apparatus for blowing glass cylinders.



H. P. HITNER. APPARATUS FOR BLOWING GLASS CYLINDERS.

APPLIUA'I'ION FILED JUNE 8, 1909.

Patented Mar. 21; 191-1.

2 SHEETS-SHBET 1.

H. F. HITNBR. APPARATUS FOR BLOWING GLASS CYLINDERS.

APPLICATION FILED JUNE 8, 1909.

987,1 3'7. Patented Mar.21,19 11.

2 EHEETS-SHEET 2.

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- o o m d; I [0 I o ,9 TE v 9' I m 0 v Mg WITNESSES INVENTOR Q esmav.

UNITED STATE IPATEN r OFFICE,

Hanna r. nr'mnn; or mom: vnnivoiv, onre, ASSIGN'OR mwssema PLA 'rE crass COMPANIYLOF PITTSBURG, PENNSYLVANIA, a conreanriou or PENNSYL' VANIA.

' APPARATUS roR BLowme G Ass oYLINnEns.

Specification of Letters Patent. P t t t, 21,1911

Application filed June 8, 1909: Serial-Na 500,862. I

' To all whom it may concern: Be it known that I, 'HARRY F. HITNER, a

lowing is a specification,

This invention has .for its primary object the provision of an improved apparatus for supplying a pressure or blast to the interior of a glass cylinder while the same is being.

drawn, which blowing apparatus'is subject I that the air can 'be blown directly into the v I Figure 1 1 to more perfect control than that ordinarily employed, and can be operated to secure a regulation of very low pressures withthe greatest nicety. I Y

Another object of this improvement is the elimination of the ordinary blow-pipe or common form'of pressure supplying device ordinarily used in forming glass cylinders,

and the provision of a bait of such character open end of the cylinder without theinterposition of any pipe or other fluid-pressure inlet means such as'is ordinarily used.

The above, as: well as such other objects as may hereinafter appear, I attain by means of a constructionwhich I have illustrated in preferred form in 'the accompanying drawjugs-wherein 'llustrates in a perspective view the application of my improvement to a drawing apparatus or drawing cage;

Figure 2 shows the wiring iagram which I employ in conjunction with the rest of the mechanism; v

Figure 3 is a side elevation of my im' proved vform of bait and blowing device applied thereto, and I Figure 4 is a plan view of the construction shown in Figure 3.

Referring now more particularly to Fig ure 1, it will be seen that Iv have therein indicated a couple of upright'guide columns 5 between which is mounted the drawing cage 6 attached to hoisting cable 7 which latter may be operated from any preferred hoisting device such as is commonly emon the downward extensions 9 from the cage,

but insulatedfrom the latter..-.; The bait I0 is composed of wring of highly resisting metal supported by suitable cross supports 12 (Figures 3' & i) from an upper frame 14, and passing out of the other, 15, after obtaining a heating effect upon the bait, by 'the'resistance of the particular metal used in the ring 10, which is also non corrosive in character. a

In order to secure proper heating efiect in'the corner-'15 I make a; short slot at 15 to force the current downward, and somewhat restrict'the conductivity below the part 1narked715. Similar slotsor like restrictive means may beused, \vhereI found;desirable,

The'ringIO. is preferably made of sub-i stantially the same diameter as the" cylinder 16 which is to be drawn, and above the part 13 there is mounted a, revolving blower fan 17 arranged to be actuated by some suitable device, as for example the electric motor indicated diagrammaticallyat 18,.the fan 'and motor being placed in position so that on revolution. vof the --blades of the: fan a down current of air into the upper open mouth of the cylinder 16 will be obtained.

.1 have foundvby ex eriment thatiuta get the right pressure efiec within the cylinderit is desirablein the preferred form of my v mechanism to use one or aplurality'of cross bars 19 shown most clearly in Figure 1, to prevent a whirling action of the air current within the cylinder, and to get a better vdisposition of the pressure due to the action of the fan. I have also found that the best results arenobtained by separating the bladesof'the fan a little from the upper face of the cross bars 19 and the connected parts 1 3,and by'having an outlet or open ing 20 between the part 13 and the strip 10,

said outlet serving apparently to produce more uniform and satisfactory pressure within the cylinder the lower end of which of oourseis closed by the surface of the metal within the tank from which the cyl inder is being drawn, as indicated at 21 in Figure 2.

.10, coming in at one of the terminals, say

Asa means for supplying current tothe hand 10 I- provide thev connections .23 leadhorizontal bar 2i adaptedto rest upon the angle iron bracket or supporting shelf 8 and carry'the' current from the conducting wires. The weight of the glass cylinder Zresting'upon the angle iron brackets 8 through the horizontal bars 24, is 'suflici'ent -to maintain ordinaril .a satisfactory con?- fltact, but other additional contact devices could be used, for supplying the. current to .eage 6 within which latter the blowing apparatus is mounted, Iprovide the loop connection shown in F gure 1, which can be engaged by any suitable .ta

} {renown device if it 15 desired to take down the cylinder mechanically.

As a means bait, I provide the generator and a transformer 31, the lines 32 ofthe transformer leading to. the connections that are.

attached tothe angle iron brackets 8. The fan motor 18 is operated by current from a generator 35, a rheostat 34 being provided for the fan:

, As a means for opening and closing regulating the movement of the " circuit in the wires 32, I provide a switch 33 which may be of any well known construction.

.The operationof my invention is as follows. The band 10 of the drawing device being lowered so as to become immersed at itslower edge in the surface of the glass in thefurnace, the'hqisting mechanism is started and at the same time the operation of the blower 17, and as the drawing cage 6 is gradually. elevated the blower 'fan by its motion" creates a gentle downward blast into the open upperjend of the cylinder 16 which is gradually being formed by the upward motion of the bait or band 10, and when the cylinder has reached its full length .the lower end is severed in any of the customary methods and the cylinder taken down and cut up as usual. :The pressure necessary in the formation of a cylinder of this character which is of the same diameter as the bait I findto be extremely light, and-the arrangement of open upper end together. with thenicety of control ossible' with the blower fan makes it possi le to secure just the desired amount necessary without too much and without liability to blow out the cylin- ?er and secure an uneven or irregular surace.

hold; of 'the 'draw- Having thu'sdescribed my invention and illustrated its use, what I claim as new and desire to secure by Letters Patent, is the folblowing fan facing the up er end of the for supplying heat to heat the passage whereby a current 0 air is supplied directly to the interior of the cylinder.

3. An apparatus for blowing glass cylinders, comprising in combination, an open ended bait,'blowing apparatus for supplyin a current of air to the interior of the cy inder attached to said bait, and device withinsaid open ended baitto prevent 0 control ratory motion of the air current within t e cylinder. I 4. An apparatus for blowing glass cylinders comprising a tubular bait, and a fan spaced away from the upper end of the bait and facin such bait whereb an unconfined body of 8.11. is forced rom t e fan and into the upper end of the ait thus supplying a relatively large quanti y of airat sure to the interior of the cylinder.

5. -An apparatus for blowing glass cylin ders comprising a bait. rovided with an air passage of re ative'ly arge dlameter, and a blowing fan facing the upper end of the passage whereby a current of air is supplied directly to the interior of the cylinder, lateral outlet means being provided intermedi- 'ate the fan and the lower edge of the bait.

6. An apparatus for blowing glass 0 linders, compr sing in combination, a bait aving substantial y the same size opening at ow presboth'ends, and a fan located on the axls of Witnesses Anonwon'rn MARTIN, HARVEY L. Lnommn.

Copies of this patent may be obtained for five cents each, by addressing the "Commissioner of Patents, Washington, D. c." 

